Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o torneio em 6 de abril?
 ###Tabelas: CREATE TABLE result_of_the_24th_election_to_the_new_zealand_house_of_representatives (result_of_the_24th_election_to_the_new_zealand_house_of_representatives_id AUTO_INCREMENT PRIMARY KEY, Party VARCHAR, Leader VARCHAR, Votes INT, Percentage VARCHAR, Seats INT) CREATE TABLE 2007_winter_season (2007_winter_season_id AUTO_INCREMENT PRIMARY KEY, Japanese Title VARCHAR, Romaji Title VARCHAR, TV Station VARCHAR, Episodes INT, Average Ratings VARCHAR) CREATE TABLE round_8_national_day_round (round_8_national_day_round_id AUTO_INCREMENT PRIMARY KEY, Home team VARCHAR, Home team score VARCHAR, Away team VARCHAR, Away team score VARCHAR, Venue VARCHAR, Crowd INT, Date VARCHAR) CREATE TABLE tournament_results (tournament_results_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Location VARCHAR, Winner VARCHAR, Score VARCHAR, 1st prize ( $ ) VARCHAR) CREATE TABLE performances_by_nation (performances_by_nation_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Gold INT, Silver INT, Bronze INT, Total INT)  
SELECT Tournament FROM tournament_results WHERE Date = apr 6